Revert "[debugger] Support simple-template-names"

This reverts commit 9af4a99cc4143d38c84e77e0ebeecf7a874b0076.

Reason for revert: fxbug.dev/117947 - the new E2E test is failing on coverage builder.

Original change's description:
> [debugger] Support simple-template-names
>
> Adds support for the -gsimple-template-names compiler flag, which
> helps reduce the size of symbol files.
>
> Fixed: 112572
> Change-Id: I6002e92b6e5406f4ace8d246be082cbde861e7bf
> Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/778205
> Commit-Queue: Jacob Rutherford <jruthe@google.com>
> Reviewed-by: Brett Wilson <brettw@google.com>

Change-Id: Ia11f1622f01459071cccbab57f42977a6cb01d31
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/779023
Reviewed-by: RubberStamper 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Commit-Queue: Jacob Rutherford <jruthe@google.com>